By : M.S.Yatnatti Editor and Video Journalist Bengaluru : Blasting is blasting ,whether it is controlled
blasting or non-controlled blasting. Its effect is disastrous .The after
effects might surface after some time. Let the BMRCL accepts the fact that
though controlled blasting technique that may minimizes the ground vibrations and reduces
the speed of fly rocks but it cannot 100% totally guarantee that buildings
above it may not crack as many building might not withstand controlled
vibrations also as they are not calculated to take such loads..The cracks are
fact and it need to resolve the issue .It cannot be adamant and arrogant on the
issue as in Bale Pete several buildings have surfaced the cracks and BMRCL itself
have propped up several pillar inside the buildings and residents are living in
constant fear of their lives in their residences.

BMRCL should accept the fact and provide safety
of life and solution to the problem by paying compensation: The effect of controlled
blasting technique may not appear today but it might surface afterwards because
it is synonymous to inner impact. Which may not be visible today but may cracks
may surface latter. Let the Government take a policy decision on this matter. Development
and Humanity should go hand in hand.

It is reported by experts that Ground
vibrations due to blasting processes are one of the fundamental problems in the
mining and civil excavation industry which may cause severe damage to the
structures. It is mostly recommended that a detail comprehensive vibration
control is required. This paper presents the results of ground induced
vibration at a metro rail station excavation site in the heart-of-city of
Bangalore. This study was carried out to control ground induced vibration, fly
rock near to sensitive structures, mostly to the city civil court and the
buildings of Sir M Visveswaraya college and like statue, school, public and
private structures closed to 10-15m. More than 60 blasts were done under
control supervision of government officials. The maximum charge/delay, charge
per hole, delay in between holes and rows were established on basis geological
rock mass. Ninety percent rock was excavated to construct underground metro
stations. The fly rock was control by optimum stemming lengths and by using
suitable fly control rubber mat.

According
to press reports ,one of the last surviving historical vestiges of namma City
that has provided millions of women and children medical relief and maternal
care now finds itself under imminent threat.The nearly
200-year-old edifice has developed a crack in its foundation, raising safety
concerns not only for those housed in it for receiving medical attention, but
also for its very own survival.Today, it sadly stands a mute testimony to what
skewed development does when authorities run roughshod over elementary issues
of protection, preservation and caution. The relocation of the pediatric
intensive care unit was done as The Metro in the north-south stretch is
underground below the Vani Vilas Hospital and becomes elevated near BMC towards
Vani Vilas Circle. Earlier due to
blasting at the work site on the Vani Vilas Hospital premises, cracks in the
ceiling of the 70-year-old hospital building were noticed. "The children's
block in Vani Vilas Hospital, Radiology Department with the cancer patients
ward, the Virology Department and the Sirur Block are affected by the blasting.
More than 100 beds each in the children's block and the cancer patients' ward were
relocated."These are stone buildings without pillars and are more than 75 years
old. Due to the decrease in the water table below Vani Vilas Hospital, the
ceiling has been impacted,” is reported in the media.